<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        :data="catelist"
        :columns="columns"
        :show-index="true"
        index-text=""
        :selection-type="false"
        :expand-type="false"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <!-- 等级排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0" size="mini">一级</el-tag>
          <el-tag
            type="success"
            v-else-if="scope.row.cat_level === 1"
            size="mini"
            >二级</el-tag
          >
          <el-tag type="warning" v-else size="mini">三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt"  slot-scope="scope">
          <el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            @click="showEditDialog(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="removeUserById(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="catelist"
            :props="{
              expandTrigger: 'hover',
              ...cascadePorps,
              checkStrictly: 'true'
            }"
            @change="parentCateChange"
            clearable
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
     <!-- 修改用户对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%">
      <el-form
        :model="editForm"
        :rules="addCateFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      // 商品分类的数据列表
      catelist: [],
      // 总数居条数
      total: 0,
      // 为table指定列的定义
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      // 控制添加分类对话框
      addCateDialogVisible: false,
      // 添加分类数据对象
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      // 添加分类规则
      addCateFormRules: {
        cat_name: [{ required: true, message: '请输入分类名称', trigger: 'blur' }]
      },
      // 父级分类列表
      parentCateList: [],
      cascadePorps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 选中的父级分类ID数组
      selectedKeys: [],
      editDialogVisible: false,
      editForm: {}
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取商品数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.querInfo })
      if (res.meta.status !== 200) this.$message.error('获取商品数据失败')
      // 赋值
      this.catelist = res.data.result
      // 为条数赋值
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    // 页码
    handleCurrentChange (newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    // 点击添加分类对话框
    showAddCateDialog () {
      // 先获取父级分类数据列表
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    // 获取父级分类列表
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) this.$message.error('获取父级分类数据失败')
      // 赋值
      this.parentCateList = res.data
    },
    // 选择项发生变化
    parentCateChange () {
      // console.log(this.selectedKeys);
      // 如果selectedKeys数组中的length大于零，证明选中的父级分类
      // 反之则没有
      if (this.selectedKeys.length > 0) {
        // 父级id
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    // 点击按钮添加分类
    addCate () {
      // console.log(this.addCateForm);
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) return this.$message.error('添加分类失败')
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 监听对话框关闭，重置表单数据
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    },
    // 删除
    async removeUserById (id) {
      // console.log(id);
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
        center: true
      }).catch(err => err)
      // 确认删除返回confirm
      // 取消删除返回cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) this.$message.error('删除权限失败')
      this.$message.success('删除权限成功')
      this.getCateList()
    },
    // 展示编辑用户
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) this.$message.error('查询用户失败')
      this.$message.success('查询用户成功')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改对话框关闭
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息提交
    editUserInfo () {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put('categories/' + this.editForm.cat_id, { cat_name: this.editForm.cat_name })
        if (res.meta.status !== 200) this.$message.error('修改用户失败')
        this.editDialogVisible = false
        this.getCateList()
        this.$message.success('修改用户成功')
        console.log(res);
      })
    }
  }
}
</script>

<style lang="less" scoped>
.treetable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
